Suffering isn't the issue. "For us" isn't the issue.
Penal suffering is the problem. We believe Christ suffered for us. We do not believe Christ was punished for us.
I have thought about this question quite a bit lately. Whether penal retribution or liberal theology's example of love it is pretty disgusting to our modern (or post modern) mindset to sacrifice your son as an example of love to all humankind OR to satisfy your own wrath.
A. We think differently than the ancients. We might be the ancient Church's inheritors and we may follow the ancient Church's liturgy and Tradition but we do not THINK like them. What communicated a theological reality to them may be lost on us. Just like committing genocide against the Canaanites (which never actually happened even according to the actual testimony of the old testament / there were a few pitched brutal battles then assimilation on Israel's part and capitulation on Canaanites part). But some ancient editor of the Pentateuch and Joshua thought it an effective communication technique to posit YHWH as a bigger badder God than theirs who commands us to wipe them out
B. We CAN relate to Jesus of his own volition choosing to suffer for us and by whose voluntary stripes we are healed.
C. We have ABSOLUTELY NO understanding of the inner workings and unity/ communion of the Holy Trinity to know how the will of one is the will of the other Persons so it really is a mystery how/why the son suffered.
D. The ransom theory is slightly less problematic than satisfying wrath or giving a pretty expensive and precious ( to say the least) "example" of love because the ONE actually rescues the many and if you look at the Aslan analogy ala CS Lewis (a deeper magic mandated the ultimate rescue of the ONE through resurrrection and tricked the witch/devil; however it still doesn't address the suffering of the ONE) you still have the dilemma of how can God "owe" a debt to the devil? Or the ethicality of the " trick" of a deeper magic.
E. Rescuing from sin and death is the one reality we can best relate to and is most readily grasped by our modern/postmodern minds.
This makes me more readily appreciate the true mystery of the cross and Orthodoxy's non dogmatic embrace of all the paradigms for approximatetely describing (but not explaining) a mystery as well as Orthodoxy's leaning toward ransom and especially rescuing from sin and death.